Heat plate and electronic device
This application provides a vapor chamber and an electronic device. The vapor chamber is formed by arranging, in a stacked manner, a plurality of graphite sheets made of graphite or graphene.
1 . A heat plate, applied to an electronic device, and comprising:
a plurality of graphite sheets made of a graphite material or a graphene material, wherein the plurality of graphite sheets are arranged in a stacked manner, and a connection layer is arranged between each two adjacent graphite sheets of the plurality of graphite sheets; and
wherein a first graphite sheet and a second graphite sheet have uneven thicknesses, wherein the first graphite sheet and the second graphite sheet are adjacent to each other, a first connection layer is between the first graphite sheet and the second graphite sheet, and wherein a thickness of a structure formed by the first graphite sheet, the second graphite sheet, and the first connection layer is even throughout the structure.
2 . The heat plate according to claim 1 , wherein:
the plurality of graphite sheets is two graphite sheets and the first connection layer is an adhesive layer; or when a quantity of graphite sheets of the plurality of graphite sheets is greater than two, a plurality of connection layers are comprised in the heat plate, at least one of the plurality of connection layers is an adhesive layer, and the remaining of the plurality of connection layers are metal bonding layers.
3 . The heat plate according to claim 2 , wherein each adhesive layer is a double-sided adhesive layer made of a double-sided adhesive material; or each adhesive layer is a thermally conductive gel layer made of thermally conductive gel.
4 . The heat plate according to claim 1 , wherein a thickness of each part of the heat plate is the same.
5 . The heat plate according to claim 1 , wherein the plurality of graphite sheets further comprises a third graphite sheet, the third graphite sheet and the first graphite sheet are outermost layers of the heat plate in a stacked arrangement direction, a surface of the first graphite sheet facing away from the second graphite sheet is provided with bonding glue, and a surface of the third graphite sheet facing away from the first graphite sheet is provided with a polyethylene terephthalate (PET) film.
6 . The heat plate according to claim 1 , wherein the thicknesses of the graphite sheets range from 0.07 mm to 0.2 mm.
7 . The heat plate according to claim 6 , wherein a thickness of at least one graphite sheet is one of 0.07 mm, 0.1 mm, 0.15 mm, or 0.2 mm.
8 . The heat plate according to claim 1 , wherein a thickness of the first connection layer ranges from 1 μm to 10 μm.
9 . The heat plate according to claim 8 , wherein the thickness of the first connection layer is 5 μm.
10 . An electronic device, comprising: a middle frame, a display screen, a circuit board, a heating element, a heat conduction element and a heat plate, wherein the display screen and the circuit board are respectively arranged on two sides of the middle frame in a thickness direction of the electronic device, the heating element is arranged on the circuit board, the heating element is in contact with the middle frame through the heat conduction element, the middle frame is provided with a groove, and the heat plate is mounted in the groove; and
the heat plate comprises a plurality of graphite sheets made of a graphite material or a graphene material, the plurality of graphite sheets are arranged in a stacked manner, a connection layer is arranged between each two adjacent graphite sheets of the plurality of graphite sheets, and thicknesses of at least two of the plurality of graphite sheets are different;
wherein there are a plurality of heating elements, the heat plate comprises a rectangular plate body and a heat conduction plate body, and the heating elements all exactly face the heat conduction plate body;
in a width direction of the electronic device, a minimum value of distances between first side edges of all the heating elements and a same side edge of the heat conduction plate body is a first distance, and a minimum value of distances between second side edges of all the heating elements and a same side edge of the heat conduction plate body is a second distance;
in a length direction of the electronic device, a minimum value of distances between third side edges of all the heating elements and a same side edge of the heat conduction plate body is a third distance, and a minimum value of distances between fourth side edges of all the heating elements and a same side edge of the heat conduction plate body is a fourth distance; and
the first distance, the second distance, the third distance, and the fourth distance are all positive numbers.
11 . The electronic device according to claim 10 , wherein a thickness of the heat plate is not greater than a depth of the groove; and
an orthographic projection of the heat conduction element on the display screen is located within an orthographic projection of the heat plate on the display screen.
12 . The electronic device according to claim 11 , wherein a shape of the heat plate is adapted to a shape constructed by the plurality of heating elements.
13 . The electronic device according to claim 10 , wherein the first distance is equal to the second distance, and the third distance is equal to the fourth distance.
14 . The electronic device according to claim 10 , further comprising a battery, wherein the battery is located on a side of the middle frame facing away from the display screen, the battery and the circuit board are spaced apart in a length direction of the middle frame, and a part of the battery is opposite to a part of the heat plate.
15 . The electronic device according to claim 14 , further comprising a first heat dissipation portion, wherein the first heat dissipation portion is located between the display screen and the heat plate, and an orthographic projection of the heat plate on the display screen is located within an orthographic projection of the first heat dissipation portion on the display screen.
16 . The electronic device according to claim 10 , wherein the plurality of graphite sheets is two graphite sheets and at least one connection layer is an adhesive layer.
17 . The electronic device according to claim 10 , wherein a quantity of graphite sheets of the plurality of graphite sheets is greater than two, a plurality of connection layers are comprised in the heat plate, at least one of the plurality of connection layers is an adhesive layer, and the remaining of the plurality of connection layers are metal bonding layers.
18 . The electronic device according to claim 10 , wherein each adhesive layer is a double-sided adhesive layer made of a double-sided adhesive material.
19 . The electronic device according to claim 10 , wherein each adhesive layer is a thermally conductive gel layer made of thermally conductive gel.
20 . The electronic device according to claim 10 , wherein the thicknesses of the graphite sheets range from 0.07 mm to 0.2 mm.